Round tuyere for furnaces



May 17, 1932. c. J. PARKER I ROUND TUYIELRE. FOR FURNACES Filed May 16,1927 2 Sheets-Sheet 1 May 17, 1932. c. JQPARKE'R 1,853,683

ROUND TUYERE FOR' FURNACES Filed May 16. 192' 2 Sheets-Sheet 2 2; JAM/ENTU/=' Patented May 17, 1932 UNITED STATES PATENT OFFICE CYRUS J. PARKER,OF PORTLAND, OREGON; MARY E, PARKER, EXEC'U'TRIX OF SAID CYRUS J.PARKER, DECEASED, ASSIGNOR TO IRON FIREARM MANUFACTURING CO]!- PAN Y, OFPORTLAND, OREGON, A CORPORATION ROUND TUYERIEi FOR FURNACES Applicationfiled May 16, 1927. Serial No. 191,606.

est blast during the early stages of combustion and the lightest blastwhen the fuef is almost entirely consumed.

The second object is to provide the maximum amount of air to thecombustion without danger of carrying over incompletely burned particlesof fuel with the blast.

I The third object is to so completely burn the fuel that there will bepractically an entire elimination of soot or smoke.

The fourth object is to so construct the tuyeres that they will developan intense heat sufiicient to fuse the incombustibles into an easilyremovable clinker which is worked up on top of the burning coals by theoncoming fuel.

The fifth object is to so construct the tuyeres that they can be easilyinstalled in various sizes of furnaces and permit the use of encirclingfire brick which protect the interior of the furnace from the directblast of the tuyeres.

These, and other objects, will become more apparent from thespecification following as illustrated in the accompanying drawings, inwhich:

Figure 1 is a vertical section through the circular fire pot and thelower portion of a furnace taken along the line 1'1 in Figure 2 and alsobreaking away a portion of the hopper to show the parts behind same.Figure 2 is a partial plan view and horizontal section taken along theline 22 in Figure 1. Figure 3 is a perspective view of a single tuyere.Figure 4 is a vertical section through the fire box of the furnace takenperpendicularly to Figure 1 and showing the fuel bed and its relationtothe tuyeres.

Similar numbers of reference refer to similar parts throughout theseveral views.

Referring in detail to the drawings, in order to illustrate thisinvention there is shown the outer casing 10 and the inner wall 11 of afurnace which is set on the base ring 12. Within the inner wall 11 andresting on the floor 13 is a hopper 14 through which coal is fedupwardly by the screw 15 in any convenient manner. Around the hopper 14is a wall 16 whose upper edge 17 is inturned to the level. of the top ofthe hopper 14, leaving an opening between same for the upward passage ofair through the air passage 18.

The three tuyeres are arranged to form the walls of a circular fire potwhose inner wall 19 converges downwardly to correspond with thedischarge opening of the hopper 14. The outer wall '20 of each tuyereisvertical and has formed therein a groove 21 adapted to receive a curvedsupporting plate 22 sufficiently narrow to permit easy assembling andhaving formed at the ends thereof the pockets 23 through whose sides arepassed the bolts 24.

The plates 22 have a double function, first to hold the tuyere sectionstogether and second to support the fire brick lining 25 which projectssomewhat above the top 26 of the tuyeres. In the top 26 is formed achannel 27 provided with a raised cover 28 having inwardly facingopenings 29 which are somewhat larger than the outwardly facing openings30.

Across the'bottom of each tuyere is formed a floor 31"i'iaving a"downturned flange 32 near whose ends are formed the inwardly projectinglugs 33 which engage the rim 34 of the hopper 14. Q

Between the flange 32 and the wall 19 is 20 ing process.

50 gether.

wardly directed blast of somewhat less volume and pressure is directedagainst same, as indicated by the arrows 43;

It must be borne in mind ing of the fuel nears completion it rapidlyloses weight and as it is gradually worked over the cover 28, which isthe highest point of the tuyere, it falls into the circular channel 44just inside of the fire bricks where the softest blast of air completesthe burn- The intense heat generated by the combustion melts theincombustibles into curved clinkers following the general shape of thetuyere, which clinkers are always on top of the-fuel bed from which theycan be 25 easily removed bysuitable tongs.

Where furnaces of greater dimensions are encountered it is onlynecessary to use a plate 22 oil greater width which will sustain largeror more fire brick 25 to fill in the space be- I tween the wall 20 andthe wall 11.

I am aware that many forms of tuyeres have been constructed in the past;I therefore do not claim same broadly but I do intend to cover all suchforms and modifications thereof as fall fairly within the followingclaims I claim:

1. A fire pot for underfeed stokers consisting of a plurality of hollowcurved tuyre 40 sections joined .in circular form having a groove formedaround the outer side of same,

each section having a main chamber and an auxlliary chambercommunicating therewith, said main chamber having inlet and outletopenings, said auxiliary chamber having unegual outlet openings onopposite sldes there 0 an annular sectional late havin its inner edgelying within sai groove, an means for clamping the sections of, saidplate to- 2. A hollow arcuate tuyere member having a main air chamberand an auxiliary air chamber in communication therewith through aplurality of openings, said member being adapted to form a section of anunderfe stoker retort, with said auxiliary chamber above the mainchamber, said lower chamber havmg an air outlet opening into the retort,said upper chamber having outlet 0 enings exceeding the area of theopenings etween said chambers.

3. A hollow arcuate tuyere member having a main air chamber and anauxiliary air chamber in communication therewith bl through a pluralityof passages, said memthat as the burn-' ber being adapted to form asection of an underfed stoker retort, with said auxiliary chamber abovethe main chamber, said lower chamber having outlet openings throughfuel-engaging side, said upper chamber having outlet openings onopposite sides thereof discharging toward and away from the cen ter ofthe retort, the outwardly pointing openings having less area than do thecorresponding inwardly pointing openings, the area of the combined lowerchamber outlets and the area of the combined upper chamber outlets eachexceeding the area of the com bined passages between the upper and lowerchambers.

4. A hollow arcuate tuyere memberhaving a main air chamber and anauxiliary air chamber in communication therewith, said member beingadapted to form a section of an underfed stoker retort, with saidauxiliary ch amber above the main chamber, said arcuate member having anuprightouter wall, a sloping inner wall and horizontal top, bottom anddividing members, said dividing member separating the main air chamberfrom the auxiliary air chamber, said main chamber having horizontalslots through said sloping wall near said dividing member, saidauxi'liary chamber having horizontal slots through the inner and outersides thereof above said dividing member, said dividing; member havingopenings therein which are less in total area than either the lowerchamber outlets or the upper chamber outlets.

CYRUS J. PARKER.

